This section contains Aptitude Questions and Answers on SQL Functions - Aggregate and Scalar functions.List of SQL Functions - Aggregate and Scalar Aptitude Questions1) What are the SQL Aggregate Functions? Functions that return single value based on column values. Functions that return single value...
These three questions are good examples of what you can expect from the job interview. As you’ve seen, the SQL aggregate functions don’t come alone. They are usually assessed simultaneously with other SQL concepts, such as grouping and filtering data, joining tables, and writing subqueries. ...
In SQL, you can summarize/aggregate the data using aggregate functions. With these functions, you will be able to answer questions like: What is the maximum value for the some_column_from_the_table? or What are the minimum values of some_column_from_the_table with respect to another_...
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SQL Aggregate Functions - Learn about SQL aggregate functions that allow you to perform calculations on multiple rows of data and return a single value. Discover how to use COUNT, SUM, AVG, MIN, and MAX in your SQL queries.
last lesson, SQL also supports the use of aggregate expressions (or functions) that allow you to summarize information about a group of rows of data. With the Pixar database that you've been using, aggregate functions can be used to answer questions like, "How many movies has Pixar ...
To calculate the month-on-month sales of a specific product in a store, we can use a combination of date functions and aggregate functions. SELECT EXTRACT(YEAR_MONTH FROM sale_date) AS year_month, SUM(quantity_sold) AS total_sales FROM sales WHERE product_id = 'your_product_id' GROUP ...
Sign in to follow questions and users Additional resources Documentation Aggregate Functions: Differences Between X++ and SQL Count Rows in a Table - Visual Database Tools Count Rows in a Table (Visual Database Tools) Summarize Query Results - Visual Database Tools Summarize Query Result...
The query uses non-standard SQL, in that the username column in the SELECT list is not also in the GROUP BY list. Standard SQL requires that in queries that use aggregate functions (MAX, MIN, SUM, AVG), all columns in the SELECT list must either be inside an aggregate function or must...
It gives an error because aggregate functions cannot be nested in SELECT statement.Answer: B. The HAVING clause doesn't allows nesting of aggregate functions.45. Predict the output of the below querySELECT avg(salary ), department_id FROM employees GROUP BY department_id ;It...